CVE-2026-116104 Details
Description
A security flaw has been discovered in Sony Neural Network Libraries up to 1.39.0. This impacts the function func_set_nnabla_version_decorate of the file python/src/nnabla/utils/converter/utils.py of the component NNP Converter. Performing a manipulation of the argument function.type results in code injection. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.
A code injection vulnerability has been identified in Sony Neural Network Libraries (NNabla) versions prior to 1.39.0. The issue arises in the NNP Converter component, specifically within the 'func_set_nnabla_version_decorate' function of 'python/src/nnabla/utils/converter/utils.py'. The vulnerability allows for remote code execution by manipulating the 'function.type' argument, which is then evaluated using Python's 'eval()' function. This exploitation takes place during the 'nnabla_cli convert' command, and the injected code is executed before the process encounters a related error, leaving no trace of the execution.
Users are advised not to convert NNP files from untrusted sources with the NNabla CLI or the converter API, as the project is no longer maintained and an upstream fix is not expected. Until a patched fork is available, this vulnerability can be mitigated by avoiding the use of the NNP converter on potentially harmful model files.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 26, 2026CISA-ADP
Assessed Nov 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/3em0/cve_repo/blob/main/2026/Sony-NNabla-1.39.0-Code-Injection-in-NNP-Converter-('function.type'-eval()).md | [email protected] | ExploitRemedyTechnical Analysis |
| https://vuldb.com/cve/CVE-2026-116104 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1003040 | [email protected] | Permission Required |
| https://vuldb.com/vuln/426172 | [email protected] | Permission Required |
| https://vuldb.com/vuln/426172/cti | [email protected] | AdvisoryContent Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-74 | Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') | [email protected] |
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Sony Neural Network Libraries | 1.39.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 2, 2026 | CVE Modified | CISA-ADP |
| Oct 26, 2026 | New CVE Received | [email protected] |